Hard-material-coated member excellent in durability

Details Hard-material-coated member excellent in durability Hard-material-coated member excellent in durability

2007-09-25

2010-06-29

Tucker, Philip C (Department: 1791)

Static molds

Container-type molding device

Of named component

C249S114100, C164S072000, C164S138000, C428S698000

Reexamination Certificate

active

07744056

ABSTRACT:
There is provided a hard-material-coated member which is suitable as a long-life mold for plastic working of metals and which has a metal as base material and coating layers formed at least on its working plane by physical vapor deposition. At least three layers, i.e., a layer a) as the outermost layer, a layer c) just above the base material and a layer b) between layer a) and the layer c) are formed as coating layers. The hardness values of these layers in terms of hardness symbol HV 0.025 are as follows:2500>(the hardness of the layer a)>1000,3500>(the hardness of the layer b)>2300,2500>(the hardness of the layer c)>1000,(500+the hardness of the layer a)<(the hardness of the layer b), and(500+the hardness of the layer c)<(the hardness of the layer b); the thickness of the layer b) is smaller than that of the layer c); and the total thickness of the coating layers is 5 to 15 μm.

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